do not rely on version of compiler being $VER.0.0 (#2194)

Co-authored-by: Stanley Gambarin <stanley.gambarin@intel.com>

Original commit:
KhronosGroup/SPIRV-LLVM-Translator@587443c

Author: Dmitry Sidorov

llvm-spirv/test/DebugInfo/NonSemantic/DebugFunction.cl

@@ -25,7 +25,7 @@ void kernel k() {
 // CHECK-SPIRV-DAG: String [[foo:[0-9]+]] "foo"
 // CHECK-SPIRV-DAG: String [[#EmptyStr:]] ""
 // CHECK-SPIRV-DAG: String [[k:[0-9]+]] "k"
-// CHECK-SPIRV-DAG: String [[#CV:]] "{{.*}}clang version [[#]].0.0
+// CHECK-SPIRV-DAG: String [[#CV:]] "{{.*}}clang version [[#]].[[#]].[[#]]
 // CHECK-SPIRV: [[#CU:]] [[#]] DebugCompilationUnit
 // CHECK-SPIRV: [[#FuncFoo:]] [[#]] DebugFunction [[foo]] {{.*}} [[#CU]]
 // CHECK-SPIRV: [[#FuncK:]] [[#]] DebugFunction [[k]] {{.*}} [[#CU]]